4.25×90 42.5的简算?
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4.25×90+42.5
=4.25×(90+10)
=4.25×100
=425
=4.25×(90+10)
=4.25×100
=425
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=4.25*9000+4.25*4+4.25*2+4.25*0.5
=425*90+17+8.5+2.175
=425*100-425*10+17+8.5+2.175
=42500-4250+27.675
=42000-4000+500-250+27.675
=38000+250+27.675
=38277.675
=425*90+17+8.5+2.175
=425*100-425*10+17+8.5+2.175
=42500-4250+27.675
=42000-4000+500-250+27.675
=38000+250+27.675
=38277.675
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